ELECTROCHEMICAL AND SPECTRAL EVIDENCE OF THE INCLUSION OF THE HERBICIDE DIFENZOQUAT BY CYCLODEXTRINS IN AQUEOUS-SOLUTION

被引：14

作者：

POSPISIL, L ^{[1
]}

HANZLIK, J ^{[1
]}

FUOCO, R ^{[1
]}

COLOMBINI, MP ^{[1
]}

机构：

[1] UNIV PISA, CNR, IST CHIM ANALIT STRUMENTALE, DIPARTIMENTO CHIM, I-56100 PISA, ITALY

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1994年 / 368卷 / 1-2期

关键词：

D O I：

10.1016/0022-0728(93)03109-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The 1,2-dimethyl-3,5-diphenyl-pyrazolium cation (the herbicide difenzoquat) forms a weak inclusion complex with beta-clodextrin having the stoichiometry 1:1. The stoichiometry of the complex and the formation constant K = 66 +/- dm3 mol-1 were determined by voltammetry and UV spectroscopy. The reduction product forms a slightly stronger complex than the difenzoquat cation itself. The inclusion of difenzoquat by alpha- and gamma-cyclodextrins is negligible. H-1-NMR data indicate that the guest most probably enters the beta-CD cavity with the pyrazole ring.

引用

页码：149 / 154

页数：6

共 26 条

[11]

MARTIN RB, 1964, INTRO BIOPHYSICAL CH, pCH9

[12]

MEITES L, 1965, POLAROGRAPHIC TECHNI, P267

[13]

NYE MJ, 1973, CAN J CHEM, V23, P338

[14] SIGNAL-INDEPENDENT ELECTROANALYTICAL METHOD [J].

OLDHAM, KB .

ANALYTICAL CHEMISTRY, 1972, 44 (01) :196-&

[15] GROWTH OF COMPACT LAYERS AT THE INTERFACE .6. ADSORPTION PROPERTIES OF DIFENZOQUAT HERBICIDE (1,2-DIMETHYL-3,5-DIPHENYL-PYRAZOLIUM) [J].

POSPISIL, L ;

HANZLIK, J ;

FUOCO, R ;

FANELLI, N .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1992, 334 (1-2) :309-321

[16] ELECTROCHEMICAL PROPERTIES OF DIFENZOQUAT HERBICIDE (1,2-DIMETHYL-3,5-DIPHENYL-PYRAZOLIUM) [J].

POSPISIL, L ;

COLOMBINI, MP ;

FUOCO, R ;

STRELETS, VV .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1991, 310 (1-2) :169-178

[17]

RAMAMURTHY V, 1986, TETRAHEDRON, V42, P3753

[18]

ROSSITER BW, 1986, PHYSICAL METHODS CHE, V2, P805

[19] CYCLODEXTRIN INCLUSION-COMPOUNDS IN RESEARCH AND INDUSTRY [J].

SAENGER, W .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 1980, 19 (05) :344-362

[20]

SAVEANT JM, 1988, B SOC CHIM FR, P225

← 1 2 3 →